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EP1595749A1 - Method of manufacturing a support plate of shock absorber for bumper beam and support plate obtained by this method - Google Patents

Method of manufacturing a support plate of shock absorber for bumper beam and support plate obtained by this method Download PDF

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Publication number
EP1595749A1
EP1595749A1 EP05290607A EP05290607A EP1595749A1 EP 1595749 A1 EP1595749 A1 EP 1595749A1 EP 05290607 A EP05290607 A EP 05290607A EP 05290607 A EP05290607 A EP 05290607A EP 1595749 A1 EP1595749 A1 EP 1595749A1
Authority
EP
European Patent Office
Prior art keywords
support plate
sole
energy absorber
bumper
bumper according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05290607A
Other languages
German (de)
French (fr)
Other versions
EP1595749B1 (en
Inventor
Patrick Masson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR0402933A external-priority patent/FR2867729B1/en
Priority claimed from FR0402934A external-priority patent/FR2867732B1/en
Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP1595749A1 publication Critical patent/EP1595749A1/en
Application granted granted Critical
Publication of EP1595749B1 publication Critical patent/EP1595749B1/en
Anticipated expiration legal-status Critical
Not-in-force legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B60R2019/1813—Structural beams therefor, e.g. shock-absorbing made of metal
    • B60R2019/182—Structural beams therefor, e.g. shock-absorbing made of metal of light metal, e.g. extruded

Definitions

  • the present invention relates to a method of manufacturing minus a support plate of an energy absorber of a bumper of motor vehicle and a support plate of a shock absorber performed by such a method.
  • the invention also relates to a bumper for a vehicle automobile.
  • manufacturers optimize the different parts of the vehicle so that guarantee maximum kinetic absorption by mechanical deformation of areas away from the cockpit and to reinforce the cabin so as to preserve the passengers.
  • the builders are using more and more energy absorbing elements in particular at the front or the rear of the vehicle and the bumpers meet technical standards, particularly with regard to the resistance to shocks.
  • bumpers that are constituted by a transverse beam and by at least two energy absorbers extending perpendicular to this beam and each connected, on the one hand, to said beam, and on the other hand, to a spar of the vehicle structure via a support plate.
  • the energy absorbers are most often formed each by a hollow body which may have particular profiles, for example profits in the form of a cross with four branches or a flared profit with sections staged or comprise zones for initiating the deformation of said hollow body in case of shocks. They are respectively fixed to the transverse beam and to the platinum support by appropriate means, such as organs screws or by means of a bead or welding points.
  • connection between the energy absorber and the spar is the most often made by a plate which has a sole intended to be fixed on the end of the spar and which is provided on one of its faces with a portion cylindrical fixing of the hollow body of the energy absorber.
  • the elements constituting the bumper ie the beam transversal, the energy absorbers as well as the support plates are, in most cases, made of steel and therefore have a significant weight. Moreover, the assembly of these different elements requires several successive operations thereby increasing the cost.
  • the purpose of the invention is therefore to propose a manufacturing method a support plate for an energy absorber that reduces weight such a room, while allowing to obtain a room with mechanical characteristics comparable to the parts used until now.
  • the invention also aims to propose a bumper of motor vehicle whose design makes it possible to obtain a gain in mass and especially to optimize the thickness of the material, while increasing the potential energy absorption of such a bumper.
  • the weld is MIG welding type.
  • the invention also relates to a support plate of a energy absorber of a motor vehicle bumper, of a type comprising a fastening sole on the end of a spar and having an orifice central edged, on one of the faces of the sole, a cylindrical portion of embedding of the energy absorber, characterized in that it is carried out by the previously mentioned method.
  • the platinum of support is made of aluminum or aluminum alloy.
  • the invention also relates to a vehicle bumper automobile, of the type comprising a beam and at least two absorbers of energy extending perpendicularly to the beam and each connected, on the one hand, said beam and, secondly, to a spar of the vehicle structure by a support plate, characterized in that the beam, the energy absorbers and the support plates are made of aluminum or aluminum alloy and realized by extrusion and in that the energy absorbers are respectively connected to the beam and the support plate by a recess and at least one weld.
  • FIG. 1 schematically shows a bumper designated as a whole by reference 1 which is mounted for example to the front of a motor vehicle on two longitudinal members 2 of the structure of this motor vehicle.
  • the bumper 1 is formed by a beam 100 extending perpendicularly to the spar 2 and connected at each of its ends to these longitudinal members 2 via an energy absorber 20 fixed on the end of the corresponding spar 2 by means of a support plate designated by the general reference 10.
  • the beam 100, the energy absorbers 20 and the support plates 10 are made of aluminum or aluminum alloy and made by extrusion.
  • the beam 100 after extrusion, is bent to give it a curve adapting to the general style of the motor vehicle.
  • the beam 100 is formed by a closed contour profile comprising a front sole 110 and a rear sole 120 parallel to each other and which are connected to one another by a rabbet upper 130, a lower rabbet 140 and an intermediate rabbet 150.
  • rabbets 130, 140 and 150 are parallel to each other other.
  • the rear sole 120 has an upper rim 160 extending parallel over the top rabbet 130 and gentle with it a longitudinal groove 160a mounting for example a hubcap, not shown.
  • This rear sole 120 also has a lower rim 170 extending parallel below the rabbet 140 and sparing with it a longitudinal groove 170a mounting for example a hubcap, no represent.
  • the energy absorber 20 shown in FIG. 3 consists, in this embodiment, by a cylindrical portion 21.
  • This absorber 20 is produced by extrusion of a cylinder comprising two portions of cylinder 21 each forming an energy absorber 20, these two portions 21 being separated from each other by an appropriate tool.
  • Each energy absorber 20 may have another shape, for example, a square shape or have different sections.
  • each support plate 10 comprises a sole 11 for attachment to the end of the corresponding spar 2 by means of screw members, not shown, which pass through the sole 11 through holes 12.
  • the sole 11 is also pierced with a central orifice 13 which is bordered on one of the faces of said sole 11 by a cylindrical portion 14 embedding of the energy absorber 20, as shown in FIG. 4.
  • the method of manufacturing such a support plate 10 includes the following steps.
  • extrusion is carried out from at least one slug aluminum or aluminum alloy at least one blank designated by the general reference 15 and shown in FIG. 6.
  • this sketch 15 includes a sole 16 of shape substantially corresponding to the shape of the sole 11 of the plate 10.
  • This sole 16 is in the form of a plate rectangular.
  • the sole 16 is provided on one of its faces with two 17 longitudinal and parallel members, extending perpendicular to said face.
  • the ribs 17 are located on either side of the center "C" of the sole 16 and the embedding "d" of said chords 17 is substantially equal to the diameter "d" of the central orifice 13 of the soleplate 11 of the plate 10.
  • the height of the two chords 17 is substantially equal to the length of the cylindrical portion 14 of the plate 10.
  • one carries out in a single extrusion operation two blanks formed in one piece. Then we separates the two blanks 15 and they are machined separately.
  • the base 17a of the chords 17 is cut from the sole 16 by an appropriate tool of known type and this cutting is performed from the two free end edges of the two chords 17 to the center of each of these chords 17, while in the middle of said chords 17, a portion 17b uncut and which makes it possible to maintain the chords 17 and the sole 16 connected to each other by this connecting portion, as shown in FIG. 7.
  • the two free portions 18 of the two chords 17 located in 17b are gradually curved towards the center "C" of the sole 16 of the blank 15 and according to the circular contour of the orifice central 13 to bring the end edges 18a of the free portions 18 of the two ribs 17 in contact, as shown in FIG. 8.
  • the adjacent end edges 18a are interconnected by a 19 and the base 17a of the chords 17 is connected to the sole 16 by a solder 17c thus forming the cylindrical portion 14 of the plate 10.
  • the welds 17c and 19 are preferably MIG welds.
  • the energy absorber 20 is connected with the beam 100 and the support plate 10 by a recess and at least one welding.
  • the embedding of the end 21a of the cylinder 21 forming the energy absorber 20 is constituted by an opening 180 formed in the rear sole 120 of the beam 100 and which has a shape conjugate to this end 21a of the energy absorber 20.
  • the opening 180 is therefore circular in shape.
  • the embedding of the end 21a of the energy absorber 20 is also constituted by a cutout 190 formed in the rabbet intermediate 150 and of shape conjugate to the axial section of said end of this energy absorber 20.
  • the blank 190 has a shape rectangular, as shown in Figs. 2 and 9.
  • the joining of the energy absorber 20 with the beam 100 is obtained by a weld bead 22 (FIG 10), preferably of the MIG type, formed between the periphery of the end 21a of the energy absorber 20 recessed in the beam 100 and the edge of the opening 180 of the rear sole 120 of said beam 100.
  • a weld bead 22 (FIG 10), preferably of the MIG type, formed between the periphery of the end 21a of the energy absorber 20 recessed in the beam 100 and the edge of the opening 180 of the rear sole 120 of said beam 100.
  • the fitting of the opposite end 21b of the cylinder 21 forming the energy absorber 20 in the support plate 10 is formed by the central orifice 13 of the plate 11 and the projecting flange 14 formed on the around this central orifice 13 and which forms a housing for said end.
  • the end 21b of the energy absorber 20 is placed inside the rim in projection 14 and in the orifice 13 and the connection between the energy absorber 20 and the support plate 10 is obtained by a weld seam 23 preferably MIG type, made between the end 21b disposed in the central orifice 13 and the edge of this orifice 13 on the opposite side of the plate to that comprising the flange projecting, as shown in FIG. 10.
  • each energy absorber 20 may comprise means initiation of the buckling of the cylinder 21 in case of shocks and which are formed by example by an annular groove 24 made for example by hydroforming.
  • the production of the support plates according to the invention in aluminum or aluminum alloy provides a gain of mass on all the parts making up the bumper and the manufacturing process of this type of extrusion support plate makes it possible to reduce the costs of manufacturing.
  • each absorber in the beam of the bumper and in the plate of support attached to the corresponding spar provides an assembly of several elements possessing good mechanical characteristics so as to guarantee a maximum of kinetic energy absorption in case of shock.
  • the extrusion process of aluminum or alloy of aluminum used to make all the parts making up the bumper according to the invention makes it possible to obtain a better optimization of the thicknesses of the matter since this type of process allows to put the material where it is useful according to the function of each component component of this bumper.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Tires In General (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The method involves producing a pre-form with a soleplate having runners, by extruding an aluminum/aluminum alloy slug. Base of the runners is cut by placing a connecting portion (17b) on the soleplate to form free portions. Each free portion is bent along contour of a central orifice (13) to bring end edges in contact. The edges are welded and the base is welded on the soleplate to form a cylindrical portion (14) of a mounting plate. An independent claim is also included for a mounting plate of a shock absorber of a bumper face bar of a motor vehicle.

Description

La présente invention concerne un procédé de fabrication d'au moins une platine de support d'un absorbeur d'énergie d'un pare-chocs de véhicule automobile ainsi qu'une platine de support d'un absorbeur de chocs réalisée par un tel procédé.The present invention relates to a method of manufacturing minus a support plate of an energy absorber of a bumper of motor vehicle and a support plate of a shock absorber performed by such a method.

L'invention concerne également un pare-chocs pour véhicule automobile.The invention also relates to a bumper for a vehicle automobile.

Les constructeurs de véhicules automobiles ont pour soucis d'améliorer la sécurité des passagers et de réduire l'augmentation de poids de ces véhicules.Motor vehicle manufacturers are worried improve passenger safety and reduce the increase in weight of these vehicles.

Pour la sécurité notamment lors d'un choc frontal ou d'un choc arrière, les constructeurs optimisent les différentes parties du véhicule de façon à garantir un maximum d'absorption cinétique par déformation mécanique des zones éloignées de l'habitacle et à renforcer l'habitacle de façon à préserver les passagers.For safety especially during a frontal impact or shock rear-end, manufacturers optimize the different parts of the vehicle so that guarantee maximum kinetic absorption by mechanical deformation of areas away from the cockpit and to reinforce the cabin so as to preserve the passengers.

Afin de minimiser les chocs que subissent les occupants, les constructeurs utilisent de plus en plus des éléments d'absorption d'énergie disposés notamment à l'avant ou à l'arrière du véhicule et les pare-chocs doivent répondre à des normes techniques notamment en ce qui concerne la résistance aux chocs.In order to minimize the shocks to the occupants, the builders are using more and more energy absorbing elements in particular at the front or the rear of the vehicle and the bumpers meet technical standards, particularly with regard to the resistance to shocks.

Pour cela, on connaít des pare-chocs qui sont constitués par une poutre transversale et par au moins deux absorbeurs d'énergie s'étendant perpendiculairement à cette poutre et reliés chacun, d'une part, à ladite poutre, et d'autre part, à un longeron de la structure du véhicule par l'intermédiaire d'une platine de support.For this, we know bumpers that are constituted by a transverse beam and by at least two energy absorbers extending perpendicular to this beam and each connected, on the one hand, to said beam, and on the other hand, to a spar of the vehicle structure via a support plate.

Les absorbeurs d'énergie sont le plus souvent formés chacun par un corps creux qui peut présenter des profils particuliers, comme par exemple des profits en forme de croix à quatre branches ou un profit évasé à sections étagées ou comporter des zones d'amorce de la déformation dudit corps creux en cas de chocs. Ils sont fixés respectivement à la poutre transversale et à la platine de support par des moyens appropriés, comme par exemple des organes de vissage ou encore au moyen d'un cordon ou de points de soudure. The energy absorbers are most often formed each by a hollow body which may have particular profiles, for example profits in the form of a cross with four branches or a flared profit with sections staged or comprise zones for initiating the deformation of said hollow body in case of shocks. They are respectively fixed to the transverse beam and to the platinum support by appropriate means, such as organs screws or by means of a bead or welding points.

La liaison entre l'absorbeur d'énergie et le longeron est le plus souvent réalisée par une platine qui comporte une semelle destinée à être fixée sur l'extrémité du longeron et qui est munie, sur une de ses faces d'une portion cylindrique de fixation du corps creux de l'absorbeur d'énergie.The connection between the energy absorber and the spar is the most often made by a plate which has a sole intended to be fixed on the end of the spar and which is provided on one of its faces with a portion cylindrical fixing of the hollow body of the energy absorber.

Les éléments constituant le pare-chocs, c'est à dire la poutre transversale, les absorbeurs d'énergie ainsi que les platines de support sont, dans la plupart des cas, réalisés en acier et présentent donc un poids important. Par ailleurs, l'assemblage de ces différents éléments demande plusieurs opérations successives augmentant de ce fait le coût.The elements constituting the bumper, ie the beam transversal, the energy absorbers as well as the support plates are, in most cases, made of steel and therefore have a significant weight. Moreover, the assembly of these different elements requires several successive operations thereby increasing the cost.

L'invention a donc pour but de proposer un procédé de fabrication d'une platine de support d'un absorbeur d'énergie qui permet de réduire le poids d'une telle pièce, tout en permettant d'obtenir une pièce possédant des caractéristiques mécaniques comparables aux pièces utilisées jusqu'à présent.The purpose of the invention is therefore to propose a manufacturing method a support plate for an energy absorber that reduces weight such a room, while allowing to obtain a room with mechanical characteristics comparable to the parts used until now.

L'invention a aussi pour but de proposer un pare-chocs de véhicule automobile dont la conception permet d'obtenir un gain de masse et surtout d'optimiser les épaisseurs de la matière, tout en accroissant le potentiel d'absorption d'énergie d'un tel pare-chocs.The invention also aims to propose a bumper of motor vehicle whose design makes it possible to obtain a gain in mass and especially to optimize the thickness of the material, while increasing the potential energy absorption of such a bumper.

L'invention a donc pour objet un procédé de fabrication d'au moins une platine de support d'un absorbeur d'énergie d'un pare-chocs de véhicule automobile, du type comprenant une semelle de fixation sur l'extrémité d'un longeron et comportant un orifice central bordé, sur une des faces de la plaque, d'une portion cylindrique d'encastrement de l'absorbeur d'énergie, caractérisé en ce que :

  • on réalise par extrusion à partir d'au moins un lopin en aluminium ou en alliage d'aluminium au moins une ébauche comportant une semelle de forme correspondant sensiblement à la forme de la semelle de la platine et munie, sur l'une de ses faces, de deux membrures longitudinales et parallèles s'étendant perpendiculairement à ladite face, la hauteur des membrures étant sensiblement égale à la hauteur de la portion cylindrique et l'écartement desdites membrures étant sensiblement égal au diamètre de l'orifice,
  • on perce l'orifice de la semelle de l'ébauche entre les membrures,
  • on découpe la base des membrures de la semelle en ménageant au milieu une portion de liaison avec ladite semelle pour former, sur chaque membrure, deux portions libres séparées de la semelle et disposées de part et d'autre de ladite portion de liaison,
  • on recourbe chaque portion libre selon le contour de l'orifice central pour amener en contact le bord d'extrémité des portions libres des deux membrures, et
  • on soude les bords d'extrémité adjacents entre eux et la base des portions libres des membrures sur la semelle pour former la portion cylindrique de la platine.
The subject of the invention is therefore a method for manufacturing at least one support plate for an energy absorber of a motor vehicle bumper, of the type comprising a mounting plate on the end of a vehicle. spar and having a central orifice lined, on one side of the plate, with a cylindrical portion for embedding the energy absorber, characterized in that:
  • at least one blank comprising an insole of shape corresponding substantially to the shape of the soleplate of the plate and provided on one of its faces is produced by extrusion from at least one billet made of aluminum or aluminum alloy. of two longitudinal and parallel chords extending perpendicularly to said face, the height of the chords being substantially equal to the height of the cylindrical portion and the spacing of said chords being substantially equal to the diameter of the orifice,
  • the orifice of the sole of the blank is drilled between the chords,
  • the base of the chords of the sole is cut by providing in the middle a connecting portion with said sole to form, on each chord, two separate free portions of the sole and disposed on either side of said connecting portion,
  • each free portion is curved along the contour of the central orifice in order to bring into contact the end edge of the free portions of the two chords, and
  • the adjacent end edges are welded together and the base of the free portions of the chords on the sole to form the cylindrical portion of the plate.

Selon une autre caractéristique de l'invention, la soudure est de type soudure MIG.According to another characteristic of the invention, the weld is MIG welding type.

L'invention a aussi pour objet une platine de support d'un absorbeur d'énergie d'un pare-chocs de véhicule automobile, de type comprenant une semelle de fixation sur l'extrémité d'un longeron et comportant un orifice central bordé, sur une des faces de la semelle, d'une portion cylindrique d'encastrement de l'absorbeur d'énergie, caractérisée en ce qu'elle est réalisée par le procédé précédemment mentionné.The invention also relates to a support plate of a energy absorber of a motor vehicle bumper, of a type comprising a fastening sole on the end of a spar and having an orifice central edged, on one of the faces of the sole, a cylindrical portion of embedding of the energy absorber, characterized in that it is carried out by the previously mentioned method.

Selon une autre caractéristique de l'invention, la platine de support est en aluminium ou en alliage d'aluminium.According to another characteristic of the invention, the platinum of support is made of aluminum or aluminum alloy.

L'invention a également pour objet un pare-chocs pour véhicule automobile, du type comprenant une poutre et au moins deux absorbeurs d'énergie s'étendant perpendiculairement à la poutre et reliés chacun, d'une part, à ladite poutre et, d'autre part, à un longeron de la structure du véhicule par une platine de support, caractérisé en ce que la poutre, les absorbeurs d'énergie et les platines de support sont en aluminium ou en alliage d'aluminium et réalisés par extrusion et en ce que les absorbeurs d'énergie sont reliés respectivement à la poutre et à la platine de support par un encastrement et au moins une soudure.The invention also relates to a vehicle bumper automobile, of the type comprising a beam and at least two absorbers of energy extending perpendicularly to the beam and each connected, on the one hand, said beam and, secondly, to a spar of the vehicle structure by a support plate, characterized in that the beam, the energy absorbers and the support plates are made of aluminum or aluminum alloy and realized by extrusion and in that the energy absorbers are respectively connected to the beam and the support plate by a recess and at least one weld.

Selon d'autres caractéristiques de l'invention :

  • la poutre est cintrée après son extrusion,
  • la poutre est formée par un profilé à contour fermé comprenant une semelle avant et une semelle arrière parallèle à ladite semelle avant et reliées entre elles par une feuillure supérieure, une feuillure inférieure et une feuillure intermédiaire, lesdites feuillures étant parallèles les unes aux autres,
  • l'encastrement d'une extrémité de chaque absorbeur d'énergie dans la poutre est formé par une ouverture ménagée dans la semelle arrière et de forme conjuguée à cette extrémité de l'absorbeur d'énergie et par une découpe ménagée dans la feuillure intermédiaire et de forme conjuguée à la section axiale de ladite extrémité de l'absorbeur d'énergie,
  • chaque platine de support comporte une plaque de fixation sur le longeron correspondant,
  • l'encastrement d'une extrémité de chaque absorbeur d'énergie dans la platine de support est formé par un orifice ménagé dans la plaque dudit absorbeur et de forme conjuguée à cette extrémité et par un rebord en saillie ménagé sur le pourtour de l'orifice et formant un logement pour ladite extrémité de l'absorbeur d'énergie,
  • la soudure de l'absorbeur d'énergie sur la poutre est réalisée entre le pourtour de l'extrémité de cet absorbeur encastrée dans la poutre et le bord de l'ouverture de la semelle arrière de ladite poutre,
  • la soudure de l'absorbeur d'énergie sur la platine de support est réalisée entre l'extrémité de cet absorbeur disposée dans l'ouverture de la plaque de la platine de support et le bord de cette ouverture,
  • chaque soudure est une soudure de type MIG,
  • chaque absorbeur d'énergie a la forme d'un cylindre,
  • le cylindre de chaque absorbeur d'énergie comporte des moyens d'amorçage du flambage dudit cylindre formés par au moins une gorge annulaire réalisée par hydroformage.
According to other features of the invention:
  • the beam is bent after extrusion,
  • the beam is formed by a closed contour profile comprising a front flange and a rear flange parallel to said front flange and interconnected by an upper rabbet, a lower rabbet and an intermediate rabbet, said rabbets being parallel to one another,
  • the embedment of one end of each energy absorber in the beam is formed by an opening formed in the rear soleplate and of conjugate shape at this end of the energy absorber and by a cutout formed in the intermediate rebate and of shape conjugate to the axial section of said end of the energy absorber,
  • each support plate comprises a fixing plate on the corresponding spar,
  • the embedding of one end of each energy absorber in the support plate is formed by an orifice formed in the plate of said absorber and of conjugate shape at this end and by a projecting rim formed on the periphery of the orifice. and forming a housing for said end of the energy absorber,
  • the welding of the energy absorber on the beam is carried out between the periphery of the end of this absorber embedded in the beam and the edge of the opening of the rear flange of said beam,
  • the welding of the energy absorber on the support plate is carried out between the end of this absorber arranged in the opening of the plate of the support plate and the edge of this opening,
  • each weld is a MIG weld,
  • each energy absorber has the shape of a cylinder,
  • the cylinder of each energy absorber comprises means for igniting the buckling of said cylinder formed by at least one annular groove produced by hydroforming.

Les caractéristiques et avantages de l'invention apparaítront au cours de la description qui va suivre, donnée à titre d'exemple et faite en référence aux dessins annexés, sur lesquels :

  • la Fig. 1 est une vue schématique en perspective d'un pare-chocs conforme à l'invention,
  • la Fig. 2 est une vue schématique en perspective d'une poutre du pare-chocs conforme à l'invention,
  • la Fig. 3 est une vue schématique en perspective d'un absorbeur d'énergie du pare-chocs conforme à l'invention,
  • la Fig. 4 est une vue schématique en perspective d'un absorbeur d'énergie comportant une platine de support conforme à l'invention,
  • la Fig. 5 est une vue en perspective de la platine de support conforme à l'invention,
  • les Figs. 6 à 8 sont des vues en perspectives montrant les différentes étapes du procédé de fabrication de la platine de support conforme à l'invention,
  • les Figs. 9 et 10 sont des vues en perspective montrant l'assemblage d'un absorbeur d'énergie respectivement dans la poutre et dans la platine de support du pare-chocs conforme à l'invention.
The characteristics and advantages of the invention will become apparent from the following description, given by way of example and with reference to the appended drawings, in which:
  • FIG. 1 is a schematic perspective view of a bumper according to the invention,
  • FIG. 2 is a schematic perspective view of a beam of the bumper according to the invention,
  • FIG. 3 is a schematic perspective view of a bumper energy absorber according to the invention,
  • FIG. 4 is a schematic perspective view of an energy absorber comprising a support plate according to the invention,
  • FIG. 5 is a perspective view of the support plate according to the invention,
  • Figs. 6 to 8 are perspective views showing the different steps of the method of manufacturing the support plate according to the invention,
  • Figs. 9 and 10 are perspective views showing the assembly of a energy absorber respectively in the beam and in the support plate of the bumper according to the invention.

Sur la Fig. 1, on a représenté schématiquement un pare-chocs désigné dans son ensemble par la référence 1 qui est monté par exemple à l'avant d'un véhicule automobile sur deux longerons 2 de la structure de ce véhicule automobile.In FIG. 1 schematically shows a bumper designated as a whole by reference 1 which is mounted for example to the front of a motor vehicle on two longitudinal members 2 of the structure of this motor vehicle.

Le pare-chocs 1 est formé par une poutre 100 s'étendant perpendiculairement au longeron 2 et reliée à chacune de ses extrémités à ces longerons 2 par l'intermédiaire d'un absorbeur d'énergie 20 fixé sur l'extrémité du longeron 2 correspondant au moyen d'une platine de support désignée par la référence générale 10.The bumper 1 is formed by a beam 100 extending perpendicularly to the spar 2 and connected at each of its ends to these longitudinal members 2 via an energy absorber 20 fixed on the end of the corresponding spar 2 by means of a support plate designated by the general reference 10.

D'une manière générale, la poutre 100, les absorbeurs d'énergie 20 et les platines de support 10 sont en aluminium ou en alliage d'aluminium et réalisés par extrusion. La poutre 100 après extrusion, est cintrée pour lui donner un galbe s'adaptant au style général du véhicule automobile.In general, the beam 100, the energy absorbers 20 and the support plates 10 are made of aluminum or aluminum alloy and made by extrusion. The beam 100 after extrusion, is bent to give it a curve adapting to the general style of the motor vehicle.

Ainsi que montré à la Fig. 2, la poutre 100 est formée par un profilé à contour fermé comprenant une semelle avant 110 et une semelle arrière 120 parallèles entre elles et qui sont reliées l'une avec l'autre par une feuillure supérieure 130, une feuillure inférieure 140 et une feuillure intermédiaire 150. As shown in FIG. 2, the beam 100 is formed by a closed contour profile comprising a front sole 110 and a rear sole 120 parallel to each other and which are connected to one another by a rabbet upper 130, a lower rabbet 140 and an intermediate rabbet 150.

Ces feuillures 130, 140 et 150 sont parallèles les unes aux autres.These rabbets 130, 140 and 150 are parallel to each other other.

De plus, la semelle arrière 120 comporte un rebord supérieur 160 s'étendant parallèlement au-dessus de la feuillure supérieure 130 et ménageant avec celle-ci une gorge longitudinale 160a de montage par exemple d'un enjoliveur, non représenté.In addition, the rear sole 120 has an upper rim 160 extending parallel over the top rabbet 130 and gentle with it a longitudinal groove 160a mounting for example a hubcap, not shown.

Cette semelle arrière 120 comporte aussi un rebord inférieur 170 s'étendant parallèlement au-dessous de la feuillure 140 et ménageant avec celle-ci une gorge longitudinale 170a de montage par exemple d'un enjoliveur, non représenté.This rear sole 120 also has a lower rim 170 extending parallel below the rabbet 140 and sparing with it a longitudinal groove 170a mounting for example a hubcap, no represent.

L'absorbeur d'énergie 20 représenté à la Fig. 3 se compose, dans cet exemple de réalisation, par une portion cylindrique 21. Cet absorbeur d'énergie 20 est réalisé par extrusion d'un cylindre comportant deux portions de cylindre 21 formant chacune un absorbeur d'énergie 20, ces deux portions 21 étant séparées l'une de l'autre par un outil approprié.The energy absorber 20 shown in FIG. 3 consists, in this embodiment, by a cylindrical portion 21. This absorber 20 is produced by extrusion of a cylinder comprising two portions of cylinder 21 each forming an energy absorber 20, these two portions 21 being separated from each other by an appropriate tool.

Chaque absorbeur d'énergie 20 peut présenter une autre forme, comme par exemple, une forme carrée ou présenter différentes sections.Each energy absorber 20 may have another shape, for example, a square shape or have different sections.

Ainsi que montré aux Figs. 4 et 5, chaque platine de support 10 comprend une semelle 11 de fixation sur l'extrémité du longeron 2 correspondant au moyen d'organes de vissage, non représentés, qui traversent la semelle 11 par des orifices 12.As shown in Figs. 4 and 5, each support plate 10 comprises a sole 11 for attachment to the end of the corresponding spar 2 by means of screw members, not shown, which pass through the sole 11 through holes 12.

La semelle 11 est également percée d'un orifice central 13 qui est bordé, sur une des faces de ladite semelle 11, par une portion cylindrique 14 d'encastrement de l'absorbeur d'énergie 20, ainsi que montré à la Fig. 4.The sole 11 is also pierced with a central orifice 13 which is bordered on one of the faces of said sole 11 by a cylindrical portion 14 embedding of the energy absorber 20, as shown in FIG. 4.

Le procédé de fabrication d'une telle platine de support 10 comprend les étapes suivantes.The method of manufacturing such a support plate 10 includes the following steps.

Tout d'abord, on réalise par extrusion à partir d'au moins un lopin en aluminium ou en alliage d'aluminium au moins une ébauche désignée par la référence générale 15 et représentée à la Fig. 6.First of all, extrusion is carried out from at least one slug aluminum or aluminum alloy at least one blank designated by the general reference 15 and shown in FIG. 6.

Pour cela, on introduit en force le lopin d'aluminium ou en alliage d'aluminium dans un canal d'une filière de section correspondant à la section de l'ébauche 15 à obtenir. For this, we introduce in force the billet of aluminum or alloy of aluminum in a channel of a section die corresponding to the section of the blank 15 to obtain.

Comme montré à la Fig. 6, cette ébauche 15 comprend une semelle 16 de forme correspondant sensiblement à la forme de la semelle 11 de la platine 10. Cette semelle 16 se présente sous la forme d'une plaque rectangulaire.As shown in FIG. 6, this sketch 15 includes a sole 16 of shape substantially corresponding to the shape of the sole 11 of the plate 10. This sole 16 is in the form of a plate rectangular.

La semelle 16 est munie, sur l'une de ses faces, de deux membrures 17 longitudinales et parallèles, s'étendant perpendiculairement à ladite face. Les membrures 17 sont situées de part et d'autre du centre "C" de la semelle 16 et l'encastrement "d" desdites membrures 17 est sensiblement égal au diamètre "d" de l'orifice central 13 de la semelle 11 de la platine 10. Par ailleurs, la hauteur des deux membrures 17 est sensiblement égale à la longueur de la portion cylindrique 14 de la platine 10.The sole 16 is provided on one of its faces with two 17 longitudinal and parallel members, extending perpendicular to said face. The ribs 17 are located on either side of the center "C" of the sole 16 and the embedding "d" of said chords 17 is substantially equal to the diameter "d" of the central orifice 13 of the soleplate 11 of the plate 10. By elsewhere, the height of the two chords 17 is substantially equal to the length of the cylindrical portion 14 of the plate 10.

Selon un mode de réalisation préférentiel, on réalise en une seule opération d'extrusion deux ébauches formées en une seule pièce. Ensuite, on sépare les deux ébauches 15 et elles sont usinées séparément.According to a preferred embodiment, one carries out in a single extrusion operation two blanks formed in one piece. Then we separates the two blanks 15 and they are machined separately.

La réalisation de l'ébauche 15 par extrusion d'aluminium ou d'alliage d'aluminium permet d'obtenir une meilleure optimisation des épaisseurs matière puisque ce type de procédé permet de mettre la matière là où elle est utile.The production of the blank 15 by extrusion of aluminum or of aluminum alloy makes it possible to obtain better optimization of the thicknesses matter since this type of process allows to put the material where it is useful.

Ensuite, le contour de la semelle 16 de l'ébauche 15 est usiné pour la mettre aux cotes de la semelle 11 de la platine 10 et l'orifice central 13, ainsi que les orifices 12 de fixation sur le longeron 2, sont percés, comme montré à la Fig. 4.Then, the outline of the sole 16 of the blank 15 is machined to put it next to the sole 11 of the plate 10 and the central orifice 13, as well as the fixing orifices 12 on the spar 2, are drilled, as shown in FIG. 4.

Après cette opération de perçage, la base 17a des membrures 17 est découpée de la semelle 16 par un outil approprié de type connu et cette découpe est réalisée à partir des deux bords d'extrémité libres des deux membrures 17 jusqu'au centre de chacune de ces membrures 17, tout en ménageant au milieu desdites membrures 17, une portion 17b non découpée et qui permet de maintenir les membrures 17 et la semelle 16 reliées entre elles par cette portion de liaison, ainsi que montré à la Fig. 7.After this drilling operation, the base 17a of the chords 17 is cut from the sole 16 by an appropriate tool of known type and this cutting is performed from the two free end edges of the two chords 17 to the center of each of these chords 17, while in the middle of said chords 17, a portion 17b uncut and which makes it possible to maintain the chords 17 and the sole 16 connected to each other by this connecting portion, as shown in FIG. 7.

Les deux portions libres 18 des deux membrures 17 situées de part et d'autre de la portion 17b, sont progressivement recourbées vers le centre "C" de la semelle 16 de l'ébauche 15 et selon le contour circulaire de l'orifice central 13 pour amener les bords d'extrémité 18a des portions libres 18 des deux membrures 17 en contact, comme montré à la Fig. 8.The two free portions 18 of the two chords 17 located in 17b, are gradually curved towards the center "C" of the sole 16 of the blank 15 and according to the circular contour of the orifice central 13 to bring the end edges 18a of the free portions 18 of the two ribs 17 in contact, as shown in FIG. 8.

Les bords d'extrémité 18a adjacents sont reliés entre eux par une soudure 19 et la base 17a des membrures 17 est reliée à la semelle 16 par une soudure 17c permettant ainsi de former la portion cylindrique 14 de la platine 10. Les soudures 17c et 19 sont de préférence des soudures de type MIG.The adjacent end edges 18a are interconnected by a 19 and the base 17a of the chords 17 is connected to the sole 16 by a solder 17c thus forming the cylindrical portion 14 of the plate 10. The welds 17c and 19 are preferably MIG welds.

En se reportant maintenant aux Figs. 9 et 10, on va décrire la liaison d'un absorbeur d'énergie 20 respectivement avec la poutre 100 et la platine de support 10, la liaison de l'autre absorbeur d'énergie 20 étant identique.Referring now to Figs. 9 and 10, we will describe the connection of an energy absorber 20 respectively with the beam 100 and the support plate 10, the connection of the other energy absorber 20 being identical.

D'une manière générale, l'absorbeur d'énergie 20 est relié avec la poutre 100 et la platine de support 10 par un encastrement et au moins une soudure.In general, the energy absorber 20 is connected with the beam 100 and the support plate 10 by a recess and at least one welding.

L'encastrement de l'extrémité 21a du cylindre 21 formant l'absorbeur d'énergie 20 est constitué par une ouverture 180 ménagée dans la semelle arrière 120 de la poutre 100 et qui présente une forme conjuguée à cette extrémité 21a de la l'absorbeur d'énergie 20. Dans l'exemple de réalisation représenté sur ces figures, l'ouverture 180 est donc de forme circulaire.The embedding of the end 21a of the cylinder 21 forming the energy absorber 20 is constituted by an opening 180 formed in the rear sole 120 of the beam 100 and which has a shape conjugate to this end 21a of the energy absorber 20. In the embodiment represented in these figures, the opening 180 is therefore circular in shape.

L'encastrement de l'extrémité 21a de la l'absorbeur d'énergie 20 est également constitué par une découpe 190 ménagée dans la feuillure intermédiaire 150 et de forme conjuguée à la section axiale de ladite extrémité de cet absorbeur d'énergie 20.The embedding of the end 21a of the energy absorber 20 is also constituted by a cutout 190 formed in the rabbet intermediate 150 and of shape conjugate to the axial section of said end of this energy absorber 20.

Dans le cas présent, la découpe 190 présente une forme rectangulaire, ainsi que montré sur les Figs. 2 et 9.In this case, the blank 190 has a shape rectangular, as shown in Figs. 2 and 9.

La solidarisation de l'absorbeur d'énergie 20 avec la poutre 100 est obtenue par un cordon de soudure 22 (Fig. 10) de préférence de type MIG, réalisé entre le pourtour de l'extrémité 21 a de l'absorbeur d'énergie 20 encastré dans la poutre 100 et le bord de l'ouverture 180 de la semelle arrière 120 de ladite poutre 100.The joining of the energy absorber 20 with the beam 100 is obtained by a weld bead 22 (FIG 10), preferably of the MIG type, formed between the periphery of the end 21a of the energy absorber 20 recessed in the beam 100 and the edge of the opening 180 of the rear sole 120 of said beam 100.

L'encastrement de l'extrémité opposée 21b du cylindre 21 formant l'absorbeur d'énergie 20 dans la platine de support 10 est formé par l'orifice central 13 de la plaque 11 et par le rebord en saillie 14 ménagé sur le pourtour de cet orifice central 13 et qui forme un logement pour ladite extrémité. L'extrémité 21b de l'absorbeur d'énergie 20 est placée à l'intérieur du rebord en saillie 14 et dans l'orifice 13 et la solidarisation entre l'absorbeur d'énergie 20 et la platine de support 10 est obtenue par un cordon de soudure 23 de préférence de type MIG, réalisé entre l'extrémité 21b disposée dans l'orifice central 13 et le bord de cet orifice 13 du côté opposé de la plaque à celui comportant le rebord en saillie, ainsi que montré à la Fig. 10.The fitting of the opposite end 21b of the cylinder 21 forming the energy absorber 20 in the support plate 10 is formed by the central orifice 13 of the plate 11 and the projecting flange 14 formed on the around this central orifice 13 and which forms a housing for said end. The end 21b of the energy absorber 20 is placed inside the rim in projection 14 and in the orifice 13 and the connection between the energy absorber 20 and the support plate 10 is obtained by a weld seam 23 preferably MIG type, made between the end 21b disposed in the central orifice 13 and the edge of this orifice 13 on the opposite side of the plate to that comprising the flange projecting, as shown in FIG. 10.

Enfin, chaque absorbeur d'énergie 20 peut comporter des moyens d'amorçage du flambage du cylindre 21 en cas de chocs et qui sont formés par exemple par une gorge annulaire 24 réalisée par exemple par hydroformage.Finally, each energy absorber 20 may comprise means initiation of the buckling of the cylinder 21 in case of shocks and which are formed by example by an annular groove 24 made for example by hydroforming.

La réalisation des platines de support conforme à l'invention en aluminium ou en alliage d'aluminium permet d'obtenir un gain de masse sur l'ensemble des pièces composant le pare-chocs et le procédé de fabrication de ce type de platine de support par extrusion permet de réduire les coûts de fabrication.The production of the support plates according to the invention in aluminum or aluminum alloy provides a gain of mass on all the parts making up the bumper and the manufacturing process of this type of extrusion support plate makes it possible to reduce the costs of manufacturing.

L'encastrement des deux extrémités de chaque absorbeur d'énergie respectivement dans la poutre du pare-chocs et dans la platine de support fixée sur le longeron correspondant permet d'obtenir un assemblage de plusieurs éléments possédant de bonnes caractéristiques mécaniques de façon à garantir un maximum d'absorption d'énergie cinétique en cas de choc.The embedding of both ends of each absorber in the beam of the bumper and in the plate of support attached to the corresponding spar provides an assembly of several elements possessing good mechanical characteristics so as to guarantee a maximum of kinetic energy absorption in case of shock.

Par ailleurs, le procédé d'extrusion d'aluminium ou d'alliage d'aluminium utilisé pour réaliser l'ensemble des pièces composant le pare-chocs selon l'invention permet d'obtenir une meilleure optimisation des épaisseurs de la matière puisque ce type de procédé permet de mettre la matière là où elle est utile selon la fonction de chaque élément composant ce pare-chocs.Moreover, the extrusion process of aluminum or alloy of aluminum used to make all the parts making up the bumper according to the invention makes it possible to obtain a better optimization of the thicknesses of the matter since this type of process allows to put the material where it is useful according to the function of each component component of this bumper.

Enfin, l'utilisation d'un matériau comme l'aluminium ou un alliage d'aluminium permet de répondre aux contraintes de style tout en optimisant au mieux la masse de l'ensemble et le coût de fabrication.Finally, the use of a material such as aluminum or an alloy aluminum can meet the constraints of style while optimizing better the mass of the whole and the cost of manufacture.

Claims (18)

Procédé de fabrication d'au moins une platine de support (10) d'un absorbeur d'énergie (20) d'un pare-chocs (1) de véhicule automobile, du type comprenant une semelle (11) de fixation sur l'extrémité d'un longeron (2) et comportant un orifice central (13) bordé, sur une des faces de la semelle (11), d'une portion cylindrique (14) d'encastrement de l'absorbeur d'énergie (20), caractérisé en ce que : on réalise par extrusion à partir d'au moins un lopin en aluminium ou en alliage d'aluminium au moins une ébauche (15) comportant une semelle (16) de forme correspondant sensiblement à la forme de la semelle (12) de la platine (10) munie sur l'une de ses faces, de deux membrures (17) longitudinales et parallèles, s'étendant perpendiculairement à ladite face, la hauteur des deux membrures (17) étant sensiblement égal à la portion cylindrique (14) et l'écartement desdites membrures (17) étant sensiblement égal au diamètre de l'orifice (13), on perce l'orifice central (13) de la semelle (16) de l'ébauche (15) entre les membrures (17), on découpe la base (17a) des membrures (17) de la semelle (16) en ménageant au milieu une portion de liaison (17b) avec ladite semelle (16) pour former, sur chaque membrure (17), deux portions libres (18) séparées de la semelle (16) et disposées de part et d'autre de ladite portion de liaison (17b), on recourbe chaque portion libre (18) selon le contour de l'orifice central (13) pour amener le bord d'extrémité (18a) des portions libres (18) des deux membrures (17) en contact, et on soude les bords d'extrémités (18a) adjacents entre eux et la base (17a) des portions libres (18) des membrures (17) sur la semelle (16) pour former la portion cylindrique (14) de la platine (10). A method of manufacturing at least one support plate (10) of an energy absorber (20) of a bumper (1) of a motor vehicle, of the type comprising a sole (11) for fixing on the end of a spar (2) and having a central orifice (13) bordered on one of the faces of the sole (11) with a cylindrical portion (14) for embedding the energy absorber (20) characterized in that at least one blank (15) is produced by extrusion from at least one billet of aluminum or aluminum alloy, comprising a sole (16) of a shape substantially corresponding to the shape of the soleplate (12) of the plate ( 10) provided on one of its faces with two longitudinal and parallel ribs (17) extending perpendicularly to said face, the height of the two chords (17) being substantially equal to the cylindrical portion (14) and spacing of said chords (17) being substantially equal to the diameter of the orifice (13), piercing the central opening (13) of the sole (16) of the blank (15) between the ribs (17), the base (17a) of the ribs (17) of the sole (16) is cut out by providing in the middle a connecting portion (17b) with said sole (16) to form, on each frame (17), two free portions (18). ) separated from the sole (16) and arranged on either side of said connecting portion (17b), each free portion (18) is curved along the contour of the central orifice (13) to bring the end edge (18a) of the free portions (18) of the two chords (17) into contact, and the adjacent end edges (18a) are welded together and the base (17a) of the free portions (18) of the chords (17) on the sole (16) to form the cylindrical portion (14) of the plate (10) . Procédé selon la revendication 1, caractérisé en ce que la soudure est du type soudure MIG.Process according to Claim 1, characterized in that the weld is of the MIG welding type. Platine de support (10) d'un absorbeur d'énergie (20) d'un pare-chocs (1) de véhicule automobile, du type comprenant une semelle (11) de fixation sur l'extrémité d'un longeron (2) et comportant un orifice central (13) bordé sur une des faces de la semelle (11), d'une portion cylindrique (14) d'encastrement de l'absorbeur d'énergie (20), caractérisée en ce qu'elle est réalisée par le procédé selon la revendication 1 ou 2.Support plate (10) for a motor vehicle bumper (1) for energy absorber (20), of the type comprising a sole (11) for attachment to the end of a spar (2) and comprising a central orifice (13) bordered on one of the faces of the sole (11), a cylindrical portion (14) for embedding the energy absorber (20), characterized in that it is produced by the process according to claim 1 or 2. Platine de support selon la revendication 3, caractérisée en ce qu'elle est réalisée en aluminium ou en alliage d'aluminium.Support plate according to Claim 3, characterized in that it is made of aluminum or aluminum alloy. Pare-chocs pour véhicule automobile, du type comprenant une poutre (100) et au moins deux absorbeurs d'énergie (20) s'étendant perpendiculairement à la poutre (100) et reliés chacun, d'une part, à ladite poutre (100) et, d'autre part, à un longeron (2) de la structure du véhicule automobile par une platine de support (10), caractérisé en ce que la poutre (100), les absorbeurs d'énergie (20) et les platines de support (10) sont en aluminium ou en alliage d'aluminium et réalisés par extrusion et en ce que les absorbeurs d'énergie (20) sont reliés respectivement à la poutre (100) et à la platine de support (10) par un encastrement et au moins une soudure (22, 23).Bumper for a motor vehicle, of the type comprising a beam (100) and at least two energy absorbers (20) extending perpendicularly to the beam (100) and each connected, on the one hand, to said beam (100) ) and, on the other hand, to a spar (2) of the structure of the motor vehicle by a support plate (10), characterized in that the beam (100), the energy absorbers (20) and the plates (10) are made of aluminum or aluminum alloy and made by extrusion and in that the energy absorbers (20) are respectively connected to the beam (100) and to the support plate (10) by a embedding and at least one weld (22, 23). Pare-chocs selon la revendication 5, caractérisé en ce que la poutre (100) est cintrée après son extrusion.Bumper according to claim 5, characterized in that the beam (100) is bent after extrusion. Pare-chocs selon la revendication 5 ou 6, caractérisé en ce que la poutre (100) est formée par un profilé à contour fermé comprenant une semelle avant (110) et une semelle arrière (120) parallèle à ladite semelle avant et reliées entre elles par une feuillure supérieure (130), une feuillure intérieure (140) et une feuillure intermédiaire (150), lesdites feuillures (130, 140, 150) étant parallèles les unes aux autres.Bumper according to claim 5 or 6, characterized in that the beam (100) is formed by a closed contour profile comprising a front flange (110) and a rear flange (120) parallel to said front flange and connected together. by an upper rabbet (130), an inner rabbet (140) and an intermediate rabbet (150), said rabbets (130, 140, 150) being parallel to one another. Pare-chocs selon la revendication 7, caractérisé en ce que la semelle arrière (120) comporte un rebord supérieur (160) s'étendant parallèlement au-dessus de la feuillure supérieure (130) et ménageant avec celle-ci une gorge longitudinale (160a) de montage d'un enjoliveur.Bumper according to claim 7, characterized in that the rear flange (120) has an upper rim (160) extending parallel to the top of the upper rabbet (130) and forming with it a longitudinal groove (160a). ) mounting a hubcap. Pare-chocs selon la revendication 7 ou 8, caractérisé en ce que la semelle arrière (120) comporte un rebord inférieur (170) s'étendant parallèlement au-dessous de la feuillure inférieure (140) et ménageant avec celle-ci une gorge longitudinale (170a) de montage d'un enjoliveur.Bumper according to claim 7 or 8, characterized in that the rear flange (120) has a lower flange (170) extending parallel to the underside of the lower rabbet (140) and providing a longitudinal groove therewith (170a) mounting a hubcap. Pare-chocs selon l'une quelconque des revendications 7 à 9, caractérisé en ce que l'encastrement d'une extrémité (21 a) de chaque absorbeur d'énergie (20) dans la poutre (100) est formé par une ouverture (180) ménagée dans la semelle arrière (120) et de forme conjuguée à cette extrémité (21a) de l'absorbeur d'énergie (20) et par une découpe (190) ménagée dans la feuillure intermédiaire (150) et de forme conjuguée à la section axiale de ladite extrémité (21 a) de cet absorbeur d'énergie (20).Bumper according to any one of claims 7 to 9, characterized in that the insertion of one end (21 a) of each energy absorber (20) in the beam (100) is formed by an opening ( 180) formed in the rear sole (120) and of conjugated form at this end (21a) of the energy absorber (20) and by a cutout (190) formed in the intermediate rebate (150) and of a shape conjugate to the axial section of said end (21 a) of this energy absorber (20). Pare-chocs selon la revendication 5, caractérisé en ce que chaque platine de support (10) comporte une plaque (31) de fixation sur le longeron (2) correspondant.Bumper according to claim 5, characterized in that each support plate (10) has a plate (31) for attachment to the corresponding spar (2). Pare-chocs selon la revendication 11, caractérisé en ce que l'encastrement d'une extrémité (21 b) de chaque absorbeur d'énergie (20) dans la platine de support (10) est formé par un orifice central (13) ménagé dans la plaque (11) de ladite platine de support (10) et de forme conjuguée à cette extrémité (21b) et par un rebord en saillie (14) ménagé sur le pourtour de l'orifice central (13) et formant un logement pour ladite extrémité (21 b) de cet absorbeur d'énergie (20).Bumper according to claim 11, characterized in that the embedding of one end (21b) of each energy absorber (20) in the support plate (10) is formed by a central orifice (13) arranged in the plate (11) of said support plate (10) and of conjugate shape at this end (21b) and by a projection flange (14) formed around the periphery of the central orifice (13) and forming a housing for said end (21b) of this energy absorber (20). Pare-chocs selon la revendication 10, caractérisé en ce que la soudure (22) de l'absorbeur d'énergie (20) sur la poutre (100) est réalisée entre le pourtour de l'extrémité (21 a) de cet absorbeur d'énergie (20) encastrée dans la poutre (100) et le bord de l'ouverture (180) de la semelle arrière (120) de ladite poutre (10).Bumper according to claim 10, characterized in that the weld (22) of the energy absorber (20) on the beam (100) is formed between the periphery of the end (21 a) of this absorber. energy (20) embedded in the beam (100) and the edge of the opening (180) of the rear flange (120) of said beam (10). Pare-chocs selon la revendication 11 ou 12, caractérisé en ce que la soudure (23) de l'absorbeur d'énergie (20) sur la platine de support (10) est réalisée entre l'extrémité (21) de cet absorbeur d'énergie (20) disposée dans l'orifice central (13) de la plaque (11) de la platine de support (10) et le bord de cet orifice central (13).Bumper according to claim 11 or 12, characterized in that the weld (23) of the energy absorber (20) on the support plate (10) is formed between the end (21) of this absorber. energy (20) disposed in the central orifice (13) of the plate (11) of the support plate (10) and the edge of this central orifice (13). Pare-chocs selon la revendication 13 ou 14, caractérisé en ce que chaque soudure (22, 23) est une soudure du type MIG.Bumper according to claim 13 or 14, characterized in that each weld (22, 23) is a MIG type weld. Pare-chocs selon l'une quelconque des revendications précédéntes, caractérisé en ce que chaque absorbeur d'énergie (20) a la forme d'un cylindre (21). Bumper according to any one of the preceding claims, characterized in that each energy absorber (20) is in the form of a cylinder (21). Pare-chocs selon la revendication 16, caractérisé en ce que le cylindre (21) de chaque absorbeur d'énergie (20) comporte des moyens (24) d'amorçage du flambage dudit cylindre (21).Bumper according to claim 16, characterized in that the cylinder (21) of each energy absorber (20) comprises means (24) for igniting the buckling of said cylinder (21). Pare-chocs selon la revendication 17, caractérisé en ce que le moyens d'amorçage du flambage sont formés par au moins une gorge annulaire (24) réalisée par hydroformage.Bumper according to claim 17, characterized in that the ignition means of the buckling are formed by at least one annular groove (24) made by hydroforming.
EP05290607A 2004-03-22 2005-03-18 Method of manufacturing a support plate of shock absorber for bumper beam and support plate obtained by this method Not-in-force EP1595749B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0402934 2004-03-22
FR0402933 2004-03-22
FR0402933A FR2867729B1 (en) 2004-03-22 2004-03-22 BUMPER FOR MOTOR VEHICLE
FR0402934A FR2867732B1 (en) 2004-03-22 2004-03-22 METHOD FOR MANUFACTURING A SUPPORT PLATE FOR AN ENERGY ABSORBER OF A BUMPER AND A SUPPORT PLATE OBTAINED BY SUCH A METHOD

Publications (2)

Publication Number Publication Date
EP1595749A1 true EP1595749A1 (en) 2005-11-16
EP1595749B1 EP1595749B1 (en) 2008-01-23

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EP05290607A Not-in-force EP1595749B1 (en) 2004-03-22 2005-03-18 Method of manufacturing a support plate of shock absorber for bumper beam and support plate obtained by this method

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EP (1) EP1595749B1 (en)
AT (1) ATE384644T1 (en)
DE (1) DE602005004442T2 (en)

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WO2009077313A1 (en) * 2007-12-19 2009-06-25 Renault S.A.S Front crossbar for automobile
EP2090472A1 (en) * 2008-02-15 2009-08-19 Alcan Technology & Management Ltd. Bumper with supports for a vehicle
CN102211558A (en) * 2011-04-02 2011-10-12 湖南亮财汽车安全科技有限公司 Automobile collision energy dissipation protection device
EP2484561A1 (en) * 2011-02-02 2012-08-08 Benteler Automobiltechnik GmbH Bumper system
WO2019138781A1 (en) * 2018-01-15 2019-07-18 株式会社神戸製鋼所 Structure for vehicles, and method for manufacturing same

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DE202007018200U1 (en) * 2007-12-28 2009-05-07 Wagon Automotive Gmbh Crashbox arrangement for a bumper of a motor vehicle body
DE102009004827B4 (en) 2009-01-13 2017-02-02 Benteler Automobiltechnik Gmbh bumper
WO2011049029A1 (en) 2009-10-19 2011-04-28 昭和電工株式会社 Vehicle bumper beam and method for manufacturing same
DE102009053861A1 (en) * 2009-11-20 2011-05-26 Benteler Automobiltechnik Gmbh bumper assembly
DE202009017015U1 (en) * 2009-12-16 2011-04-28 Rehau Ag + Co. Absorber element for a motor vehicle
DE102011119092B4 (en) * 2011-11-22 2020-09-10 Audi Ag Side member for a support structure of a motor vehicle
DE102013201437B4 (en) * 2013-01-29 2020-10-15 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle
DE102013103366B4 (en) 2013-04-04 2016-02-18 Benteler Automobiltechnik Gmbh Method and device for producing an energy absorption profile for a motor vehicle
DE102018124334B3 (en) * 2018-10-02 2020-02-06 Benteler Automobiltechnik Gmbh Method for producing a hollow profile component for a vehicle

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DE19603953C1 (en) * 1996-02-05 1997-04-17 Ymos Ag Ind Produkte Collision damper for energy uptake during front or rear collision of road vehicle
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WO2009077313A1 (en) * 2007-12-19 2009-06-25 Renault S.A.S Front crossbar for automobile
FR2925429A1 (en) * 2007-12-19 2009-06-26 Renault Sas FRONT TRAVERSE FOR MOTOR VEHICLE
EP2090472A1 (en) * 2008-02-15 2009-08-19 Alcan Technology & Management Ltd. Bumper with supports for a vehicle
EP2484561A1 (en) * 2011-02-02 2012-08-08 Benteler Automobiltechnik GmbH Bumper system
CN102211558A (en) * 2011-04-02 2011-10-12 湖南亮财汽车安全科技有限公司 Automobile collision energy dissipation protection device
WO2019138781A1 (en) * 2018-01-15 2019-07-18 株式会社神戸製鋼所 Structure for vehicles, and method for manufacturing same

Also Published As

Publication number Publication date
DE602005004442T2 (en) 2009-01-22
DE602005004442D1 (en) 2008-03-13
EP1595749B1 (en) 2008-01-23
ATE384644T1 (en) 2008-02-15

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